Slitter-Winder Web End Attachment via Support Shift
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Solution Overview
Problem
Existing slitter-winders require a separate and heavy web end attachment station for attaching the end of the web roll to the surface, which is inefficient and requires additional equipment for web roll rotation and removal, limiting the processing of larger rolls.
Innovation Solution
A method where web rolls are supported by two lower elements, with the web brought onto the roll via the first support element and transferred to the second support element during winding, allowing the web end attachment unit to deliver adhesive material to the roll surface while it rotates, eliminating the need for a separate attachment station and enhancing cutting conditions for larger rolls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate web end attachment station is used, then the web end can be attached to the web roll, but the equipment becomes heavy and complex requiring additional web roll rotation and removal means
Solution Approach 1:
The patent combines the web end attachment function with the existing winding section by integrating an attachment unit that can apply adhesive material directly at the winding location. This eliminates the need for a separate attachment station with its own complex rotation and removal mechanisms, as the attachment operation is merged into the existing winding process flow.
Solution Approach 2:
The patent extracts the attachment unit from a separate stationary attachment station and relocates it to operate directly on the rotating web roll at the winding section. This allows the attachment function to be performed in-situ during winding, removing the need for additional dedicated rotation and removal equipment that would be required at a separate station.
2Ease of operation
If web rolls are supported by two lower support elements, then the web can be brought onto the roll via the first support element, but a separate attachment station is still required
Solution Approach 1:
The patent merges the web end attachment operation with the winding operation by positioning the attachment unit at the winding section where the web roll is already being formed. This allows both the winding and attachment functions to occur simultaneously at the same location, eliminating the need for separate attachment stations and improving productivity while maintaining ease of web handling through the two support elements.
3Reliability
If a separate attachment station is used, then the web end can be attached, but larger rolls cannot be processed effectively
Solution Approach 1:
The patent makes the attachment unit dynamic by positioning it to operate on the rotating web roll at the winding section, where it can adapt to different roll sizes. The attachment unit applies adhesive material to the surface of the rotating roll, allowing it to effectively process larger rolls that would be difficult or impossible to handle at a separate stationary attachment station with fixed rotation mechanisms.
Data Source
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AI summary
The present invention relates to a method in connection with a slitter-winder of a fibrous web for attaching the end of the web of each web roll to the surface of the roll, in which method the web rolls are wound supported by at least two lower support elements (12,13) and in which, during winding, the web is brought onto the roll via the first support element (12) and, upon completing the winding, each completed roll (14) is transferred by a pushing device. In transfer, the support of the roll shifts away from said first support element (12) onto the second support element (13) and the web (w') travelling from the first support element (12) onto the web roll is slit, after which the web end attachment unit (19) is brought into its operating position such that it can deliver the adhesive material to the surface of the roll (14), and in which method the web roll is rotated by and supported by the second support element (13) while the adhesive material is delivered to the surface of the roll (14).